Results 71 to 80 of about 6,142 (212)

Quantum magnetometry using two-stroke thermal machines

New Journal of Physics, 2020
The precise estimation of small parameters is a challenging problem in quantum metrology. Here, we introduce a protocol for accurately measuring weak magnetic fields using a two-level magnetometer, which is coupled to two (hot and cold) thermal baths and
Sourav Bhattacharjee, Utso Bhattacharya, Wolfgang Niedenzu, Victor Mukherjee, Amit Dutta   +4 more
doaj   +1 more source

Quantum magnetometers as a base for atomic clock

Journal of Physics: Conference Series, 2016
The possibility of the atomic clock based on two quantum magnetometer system development is demonstrated. One of the magnetometers is self-oscillation type, another is Mz- type magnetometer based on end-state UHF resonance. The laser pumping of 87Rb atoms placed into antirelaxation coated sell is provided.
E A Sagitov, S V Ermak, M V Petrenko, V V Semenov   +3 more
openaire   +1 more source

The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet

Advanced Science, EarlyView.
The interplay between magnetic ordering and crystal electric field (CEF) excitations plays a pivotal role in defining the low‐energy electrodynamics of quantum materials. By probing the temperature‐dependent THz conductivity in a rare‐earth‐based metallic ferromagnet, we uncover a microscopic connection between localized and itinerant electrons ...
Payel Shee, Tanaya Halder, Chia‐Jung Yang, Nainish Tickoo, Ratiranjan Samal, Ruta Kulkarni, Shishir K. Pandey, Vikas Kashid, Ashis K. Nandy, Arumugam Thamizhavel, Anamitra Mukherjee, Shovon Pal   +11 more
wiley   +1 more source

Components for an Inexpensive CW-ODMR NV-Based Magnetometer

Magnetism
Quantum sensing based on NV-centers in diamonds has been demonstrated many times in multiple publications. The majority of publications use lasers in free space or lasers with fiber optics, expensive optical components such as dichroic mirrors, or beam ...
André Bülau, Daniela Walter, Karl-Peter Fritz   +2 more
doaj   +1 more source

Accuracy of the scalar magnetometer aboard ESA's JUICE mission [PDF]

Geoscientific Instrumentation, Methods and Data Systems
This paper discusses the accuracy of the scalar Coupled Dark State Magnetometer on board the Jupiter Icy Moons Explorer (JUICE) mission of the European Space Agency (ESA). The scalar magnetometer, referred to as MAGSCA, is part of the J-MAG instrument.
C. Amtmann, A. Pollinger, M. Ellmeier, M. Ellmeier, M. Dougherty, P. Brown, R. Lammegger, A. Betzler, A. Betzler, M. Agú, C. Hagen, I. Jernej, J. Wilfinger, R. Baughen, A. Strickland, W. Magnes   +15 more
doaj   +1 more source

Hidden Charge‐Order in the Mixed‐Valent K0.75Li2Cr6O12 High‐Pressure Oxide

Advanced Science, EarlyView.
K0.75Li2Cr6O12 is one of the few mixed valent chromium oxides. It shows a single angle spiral magnetic structure with a k = [1/3 1/3 ¼] propagation vector. Density functional theory reveals a hidden charge order that is necessary to stabilize the antiferromagnetic (AFM) ground state.
Angel M. Arévalo‐López, Clemens Ritter, Marielle Huvé, Olivier Mentré   +3 more
wiley   +1 more source

Large Anomalous Hall Effect, Non‐Vanishing Berry Curvature in (110) FeRh Antiferromagnet Films via Interface Strain

Advanced Science, EarlyView.
This study demonstrates a strain‐tunable anomalous Hall response in the (110)‐oriented FeRh thin film. First‐principles calculations reveal that strain‐induced symmetry lowering redistributes Berry curvature near the Fermi level via band shifts and avoided crossings.
Yun‐Ho Kim, Gil‐Sung Kim, Jae Won Choi, Jung‐Min Cho, Won‐Yong Lee, Hongkee Yoon, Yeonho Choi, Shelby Fields, Steven Bennett, Mona Zebarjadi, Young‐Gui Yoon, Sang‐Kwon Lee   +11 more
wiley   +1 more source

Multichannel highly sensitive diamond quantum magnetometer

We demonstrate a highly sensitive real-time magnetometry method at two measurement points. This magnetometry method is based on the frequency-division multiplexing of continuous-wave optically detected magnetic resonance. We use two ensembles of nitrogen-vacancy (NV) centers separated by 3.6 mm to measure a magnetic field.
Yoshimura, Atsumi, Kanamoto, Ayumi, Sekiguchi, Naota, Shinei, Chikara, Miyakawa, Masashi, Taniguchi, Takashi, Teraji, Tokuyuki, Abe, Hiroshi, Onoda, Shinobu, Ohshima, Takeshi, Iwasaki, Takayuki, Hatano, Mutsuko   +11 more
openaire   +2 more sources

Leaky‐Integrate‐Fire Neuron via Synthetic Antiferromagnetic Coupling and Spin‐Orbit Torque

Advanced Science, EarlyView.
A spintronic leaky‐integrate‐and‐fire neuron is realized using Spin Orbit Torque driven domain‐wall motion for integration and synthetic antiferromagnetic coupling for the leaky process. The specialized Hall‐bar geometry enables controlled DW dynamics, achieving repeatable integration and firing events. This compact, CMOS‐compatible design highlights a
Badsha Sekh, Durgesh Kumar, Hasibur Rahaman, Ravi Shankar Verma, Ramu Maddu, Jianpeng Chan, Wai Lum William Mah, Stuart S. P. Parkin, S. N. Piramanayagam   +8 more
wiley   +1 more source

Robotic Vectorial Field Alignment for Spin‐Based Quantum Sensors

Advanced Science
Developing practical quantum technologies will require the exquisite manipulation of fragile systems in a robust and repeatable way. As quantum technologies move toward real world applications, from biological sensing to communication in space ...
Joe A. Smith, Dandan Zhang, Krishna C. Balram   +2 more
doaj   +1 more source